Archiving old products / services from my "back office"

I'm looking for a way to keep my list of services organised.

I sell calligraphy workshops through my site and list them as services;  once the event has passed I remove that date from my pages however  I'd like to be able to archive that product from my "back office" as well. I may be missing an obvious solution, but I can't seem to filter the events by past / future or fulfilled/unfulfilled. So I end up with an annoying jumble of past and future events that will only get longer with time.. Is there a way to archive past events (services) from my back office in Squarespace? Thanks